A5

A5/registers.c

@@ -0,0 +1,49 @@
+/*
+  Implementation of x86prime 16 registers
+*/
+
+#include "registers.h"
+#include "support.h"
+#include "trace_read.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+struct registers {
+    trace_p tracer;
+    val data[16];
+};
+
+reg_p regs_create() {
+    reg_p regs = (reg_p) malloc(sizeof(struct registers));
+    for (int i = 0; i < 16; ++i)
+        regs->data[i] = from_int(0);
+    regs->tracer = 0;
+    return regs;
+}
+
+void regs_destroy(reg_p regs) {
+    if (regs->tracer) {
+        if (!trace_all_matched(regs->tracer))
+            error("Parts of trace for register writes was not matched");
+        trace_reader_destroy(regs->tracer);
+    }
+    free(regs);
+}
+
+void regs_tracefile(reg_p regs, const char *filename) {
+    regs->tracer = trace_reader_create('R', filename);
+}
+
+val reg_read(reg_p regs, val reg_num) {
+    return regs->data[reg_num.val & 0x0F];
+}
+
+void reg_write(reg_p regs, val reg_num, val value, bool wr_enable) {
+    if (wr_enable) {
+        if (trace_match_next(regs->tracer, reg_num, value))
+            regs->data[reg_num.val & 0x0F] = value;
+        else
+            error("Trace mismatch on write to register");
+    }
+}